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前言小口径钻进是提高钻探效率、革新钻探装备技术的关键措施之一。在无产阶级文化大革命的推动下,我国煤田钻探职工发扬“独立自主”、“自力更生”的革命精神,大搞群众运动,陆续在各地试验应用77毫米口径钻进,同时研制人造金刚石钻头,取得了良好效果。近年来,由于试制出可以破碎硬度较高的岩石的针状合金钻头和人造金刚石钻头,采用了延长管材寿命的热处理技术,制定出合适的管材配套标准,设计制造了小口径专用打捞工具,试验
Introduction Small diameter drilling is one of the key measures to improve drilling efficiency and reform drilling technology. Driven by the Great Proletarian Cultural Revolution, China’s coalfield drilling workers carried forward the revolutionary spirit of “independence and independence” and “self-reliance” and vigorously promoted the mass movement. In succession, they experimented with 77 mm caliber holes and developed synthetic diamond drill bits, achieving good results effect. In recent years, due to the trial production of high-hardness rock crushing needle alloy and synthetic diamond bit, the use of pipe life to extend the heat treatment technology to develop a suitable standard pipe fittings, design and manufacture of small-caliber special fishing tools, test